Auxiliary power supply devices and nonvolatile memory systems including the same

摘要

An auxiliary power supply device can include a first power storage unit, a first charging circuit to receive input power and charge the first power storage unit, a second power storage unit having lower power supply speed than the first power storage unit and longer power supply time than the first power storage unit, a second charge circuit to receive input power and charge the second power storage unit, and a switching unit to supply the stored power of the first power storage unit to external devices for a predetermined time when a sudden power-off occurs and supply stored power of the second power storage unit to the external devices after the predetermined time elapses.

主权项

1. A nonvolatile memory system comprising:
a nonvolatile memory device; a memory controller configured to control the nonvolatile memory device; and an auxiliary power supply device configured to receive an input power and supply an output power to the nonvolatile memory device and to the memory controller, wherein the auxiliary power supply device comprises a first power storage unit and a second power storage unit, wherein the auxiliary power supply device is configured to detect a sudden power-off, to initially supply stored power of the first power storage unit to the nonvolatile memory device and the memory controller as the output power when the sudden power-off is detected, and to subsequently supply stored power of the second power storage unit to the nonvolatile memory device and the memory controller as the output power after supplying the stored power of the first power storage unit, and wherein the first power storage unit is configured to supply a larger power supply amount per unit time than the second power storage unit, and the second power storage unit is configured to supply stored power for a longer time than the first power storage unit.